Exercise bike frame



FIG. 1 is a first perspective view of an exercise bike frame showing mynew design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is an opposite side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a second perspective view thereof.

CLAIM The ornamental design for an exercise bike frame, as shown anddescribed.